Cabrero J, Bakkali M, Bugrov A, Warchalowska-Sliwa E, López-León M D, Perfectti F, Camacho J P M
Departamento de Genética, Universidad de Granada, 18071 Granada, Spain.
Chromosoma. 2003 Dec;112(4):207-11. doi: 10.1007/s00412-003-0264-2. Epub 2003 Nov 20.
Analysis of chromosome localization of three molecular markers, 18S-5.8S-28S rDNA, 5S rDNA and a 180 bp satDNA, showed that B chromosomes in the grasshopper Eyprepocnemis plorans originated independently in Eastern (Caucasus) and Western (Spain and Morocco) populations. Eastern B chromosomes are most likely derived from the smallest autosome, which is the only A chromosome carrying the three markers, in coincidence with Caucasian B chromosomes. Western B chromosomes, however, lack 5S rDNA and are most likely derived from the X chromosome, which is the only A chromosome carrying the two remaining markers, always in the same order with respect to the centromere, as the B chromosome.
对三种分子标记（18S - 5.8S - 28S rDNA、5S rDNA和一段180 bp的卫星DNA）的染色体定位分析表明，牧草蝗（Eyprepocnemis plorans）中的B染色体在东部（高加索地区）和西部（西班牙和摩洛哥）种群中独立起源。东部B染色体很可能源自最小的常染色体，它是唯一携带这三种标记的A染色体，这与高加索地区的B染色体情况相符。然而，西部B染色体缺乏5S rDNA，很可能源自X染色体，X染色体是唯一携带其余两种标记的A染色体，相对于着丝粒而言，其标记顺序与B染色体的顺序始终相同。
